Asep Sandra Budiman, Asep Sandra
Program Studi Ilmu Kelautan, Sekolah Pascasarjana IPB, Bogor

Published : 2 Documents
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THE POSSIBILITY OF TIDAL FLOOD ON PROBOLINGGO COASTAL AREA AND ITS COMPARISON CONDITION BETWEEN WEST AND EAST SEASONS BASED ON OCEANOGRAPHICAL AND METEOROLOGICAL DATA Budiman, Asep Sandra; Supriadi, Indarto Happy
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 11 No. 3 (2019): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v11i3.20349

Abstract

Rob atau banjir pasang air laut telah menjadi permasalahan serius di beberapa daerah pesisir di Indonesia, khususnya Probolinggo. Kajian mengenai banjir rob di wilayah ini telah dilakukan dengan mengolah dan menganalisa data-data oseanografi dan meteorologi untuk mengkaji seberapa besar potensi kejadian dan perbandingan kondisinya saat musim Barat dan Timur. Data-data yang digunakan adalah data pasang-surut (pasut) dan angin wilayah Probolinggo selama 7 tahun (2004 - 2011) dari Stamet II Perak Surabaya, serta data topografi Probolinggo dari Shuttle Radar Topography Mission (SRTM). Potensi terjadinya banjir rob ditentukan dengan membandingkan tinggi muka air ini dengan topografi daerah kajian. Data meteorologi dianalisa untuk dibandingkan kondisinya saat musim Barat dan Timur. Hasil menunjukkan bahwa banjir rob dapat terjadi di beberapa titik di pesisir Probolinggo saat pasang tinggi khususnya selama periode pasang purnama akibat tinggi muka air yang lebih tinggi (0,73 m) daripada ketinggian topografi daerah kajian (rerata <0.5 m). Kondisi akan lebih buruk selama musim Timur akibat datangnya angin kencang dari arah yang berpotensi dalam kemunculan gelombang tinggi di pesisir.  
WAVE PROPAGATION AND RESIDUAL CURRENT OF TIDE IN MAYALIBIT BAY: 2D HYDRODYNAMICS MODEL OF TIDE Budiman, Asep Sandra; Koropitan, Alan F.; Nurjaya, I Wayan
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 7 No. 1 (2015): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v7i1.9802

Abstract

Study on tidal waves and residual currents in Mayalibit Bay was conducted by constructing the 2D numerical hydrodynamics to find the characteristics of tide and residual currents inside the Bay. The 2D hydrodynamic equations with non-linier terms were solved by finite difference methods explicitly. M2 and K1 wave propagations were observed and analyzed at 25 observation points. M2 and K1 residual currents were obtained and described spatially. Simulation results of tidal currents were validated with field measurements. The validation result showed that the tidal currents between the model results and field measurements were quite fit. Generally, simulation results showed the significant differences between the tide inside and outside the Bay. This was strongly explained by the simulation results of M2 and K1 wave propagations. The M2 and K1 amplitudes were 10 times lower inside  than outside the Bay with the phase lags of about 180°(M2) and 160°(K1). This result indicated that the tide inside and outside the Bay were in the opposite conditions. The tide had an ebb inside while the flood was outside and vice versa.  M2 residual currents was flowed into the Bay uniformly, while K1 residual currents flowed out to the open sea in the Northern part and it flowed into the Bay in the Southern part of the Bay. Eventually, both of them converged in the middle of the Bay. Keywords: tide, tide-induced residual current, numerical method